import enum
from enum import Enum

@enum.unique
class Color(Enum):
    RED = 1
    CRIMSON = 1
    SALMON = 1

    GREEN = 2
    BLUE = 3
# RED, CRIMSON, SALMON are aliases

print(Color.RED is Color.CRIMSON)
print(Color(1)) # only main member

for color in Color: # only main members
    print(color)